- #1
ColonelPanic
- 6
- 0
Hello,
I have designed a circuit based on one that I found on the internet (attached as example.gif). This circuit worked well when I built it on a breadboard.
I made a few minor modifications to the example circuit (attached as schem1.bmp) and I am having a few issues that I do not understand. The modifcations are simple, as all I have done really is add additional LEDs to the circuit in both the LED1 and LED2 positons of the example and also add an additional circuit on the same board that shares the same ground.
I have the following issues with the circuit that I have built:
1) The timer function no longer works at all. I have tried swapping resistors after the 555 pin3, as well as the componnets in R1, R2, and C1.
2) The brightnesses between the LED1 and LED2 positions are inconsistent, when a test voltage is applied.
3) The additional circuit on the board is a simple resistor/led circuit. The issue is that when the LEDs are turned on, you can visually see effects from the frequency of the 555 timer.
Each positive lead was tested using the digital output of an Arduino microcontroller at 5v.
Any help would be greatly appreciated, as it has me stumped...
I have designed a circuit based on one that I found on the internet (attached as example.gif). This circuit worked well when I built it on a breadboard.
I made a few minor modifications to the example circuit (attached as schem1.bmp) and I am having a few issues that I do not understand. The modifcations are simple, as all I have done really is add additional LEDs to the circuit in both the LED1 and LED2 positons of the example and also add an additional circuit on the same board that shares the same ground.
I have the following issues with the circuit that I have built:
1) The timer function no longer works at all. I have tried swapping resistors after the 555 pin3, as well as the componnets in R1, R2, and C1.
2) The brightnesses between the LED1 and LED2 positions are inconsistent, when a test voltage is applied.
3) The additional circuit on the board is a simple resistor/led circuit. The issue is that when the LEDs are turned on, you can visually see effects from the frequency of the 555 timer.
Each positive lead was tested using the digital output of an Arduino microcontroller at 5v.
Any help would be greatly appreciated, as it has me stumped...